Originally Posted by CindyIL
Diotomatious (die-o-toe-may-shus)earth, which is sold at pool supply stores for pool filters, can be sprinkled on your doorstep & it will deter them from coming in. It resembles baking soda, but is sharp to them & will kill them by dehydration if they do cross over it.
i use that for slugs...works great around the garden. didn't know that about ants too...
some people say that ants won't cross a chalk line..so you bulls-eye your house!